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Full-Text Articles in Medicine and Health Sciences
Hiv-1 Reactivation Induced By The Periodontal Pathogens Fusobacterium Nucleatum And Porphyromonas Gingivalis Involves Toll-Like Receptor 2 And 9 Activation In Monocytes/Macrophages, Octavio A. Gonzalez, Mengtao Li, Jeffrey L. Ebersole, Chifu B. Huang
Hiv-1 Reactivation Induced By The Periodontal Pathogens Fusobacterium Nucleatum And Porphyromonas Gingivalis Involves Toll-Like Receptor 2 And 9 Activation In Monocytes/Macrophages, Octavio A. Gonzalez, Mengtao Li, Jeffrey L. Ebersole, Chifu B. Huang
Center for Oral Health Research Faculty Publications
Although oral coinfections (e.g., periodontal disease) are highly prevalent in human immunodeficiency virus type 1-positive (HIV-1+) patients and appear to positively correlate with viral load levels, the potential for oral bacteria to induce HIV-1 reactivation in latently infected cells has received little attention. We showed that HIV-1 long terminal repeat (LTR) promoter activation can be induced by periodontopathogens in monocytes/macrophages; nevertheless, the mechanisms involved in this response remain undetermined. Since Toll-like receptor 2 (TLR2), TLR4, and TLR9 activation have been involved in HIV-1 recrudescence, we sought to determine the role of these TLRs in HIV-1 reactivation induced by …
Mmp-9/Timp-1 Imbalance Induced In Human Dendritic Cells By Porphyromonas Gingivalis, Ravi Jotwani, Sridhar V K Eswaran, Surinder Moonga, Christopher W Cutler
Mmp-9/Timp-1 Imbalance Induced In Human Dendritic Cells By Porphyromonas Gingivalis, Ravi Jotwani, Sridhar V K Eswaran, Surinder Moonga, Christopher W Cutler
Journal Articles
Matrix metalloproteinase-9 (MMP-9) cleaves collagen, allowing leukocytes to traffic toward the vasculature and the lymphatics. When MMP-9 is unregulated by tissue inhibitor of metalloproteinase-1 (TIMP-1), this can lead to tissue destruction. Dendritic cells (DCs) infiltrate the oral mucosa increasingly in chronic periodontitis, characterized by infection with several pathogens including Porphyromonas gingivalis. In this study, human monocyte-derived DCs were pulsed with different doses of lipopolysaccharide of P. gingivalis 381 and of Escherichia coli type strain 25922, as well as whole live isogenic fimbriae-deficient mutant strains of P. gingivalis 381. Levels of induction of MMP-9 and TIMP-1, as well as interleukin-10 (IL-10), …